My Inquiry
My Account
Texas Instruments BQ294604DRVR
- Part No.:
- BQ294604DRVR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
BQ294604DRVR.pdf
- Description:
- IC BATT PROT LI-ION 1CELL 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:5,745
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BQ294604DRVR from Texas Instruments is a single-cell lithium-ion battery secondary overvoltage protector IC with fixed 4.35V OVP threshold, 6.5s fault detection delay, ±10mV accuracy at 25°C, <100nA input leakage per cell, and 1µA supply current under protection-disable conditions-used to drive external N-channel FETs for fuse-blowing in portable tablets and slates.
For engineers reviewing the BQ294604DRVR datasheet, BQ294604DRVR pinout, BQ294604DRVR application, or BQ294604DRVR equivalent, this page delivers verified electrical specs, thermal metrics, functional mode behavior, and real-world implementation constraints for second-level Li-ion pack safety design.
Technical Context
The BQ294604DRVR implements a dedicated analog comparator-based overvoltage detection circuit with factory-trimmed 4.35V reference and integrated 6.5s fixed-delay timer. It operates in NORMAL mode (OUT low) until V1 exceeds VOV, then transitions to OVERVOLTAGE mode after delay, pulling OUT high to activate an external NMOS gate.
Its functional architecture includes independent V1 sense input with RC filtering support, dual VSS pins for robust ground referencing, VDD supply input with series resistor/capacitor recommendations, and thermal pad (PWRPAD) tied to VSS on PCB. No internal regulator or digital logic-pure analog timing and output drive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| OVP Threshold | 4.35V ±10mV at 25°C - sets precise cell voltage trip point for secondary protection |
| OVP Delay Time | 6.5s (fixed) - provides time-limited response window before fuse activation |
| Supply Current (ICC) | 1µA typical when VCELL < VPROTECT - enables ultra-low-power standby in battery packs |
| Input Leakage (IIN) | <100nA per cell input - minimizes self-discharge impact on protected Li-ion cells |
| Output Drive | High-side open-drain capable of sourcing ≥1.5mA short-circuit current - directly drives NMOS gate without buffer |
| Operating Temp | –40°C to +110°C - supports industrial-grade battery pack operation across wide ambient range |
| Hysteresis (VHYS) | 300mV typical - prevents chatter during voltage recovery near trip threshold |
Pinout & Package
Package: WSON-6 (DRV), 2.0mm × 2.0mm body, 0.8mm max height, exposed thermal pad (PWRPAD) electrically connected to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 NC | No connection | Unbonded pad - must remain floating; no PCB trace or solder mask opening required |
| 2 V1 | Sense input | Positive terminal monitor for single Li-ion cell; requires external RIN/CIN filter per layout guidelines |
| 3 VSS | Ground reference | Primary IC ground and cell negative return; must connect externally to CELL– terminal |
| 4 VSS | Ground reference | Secondary IC ground; both VSS pins must be routed to same CELL– net for noise immunity |
| 5 VDD | Power supply | Unregulated input (3–8V); requires series resistor and bypass capacitor for EMI suppression |
| 6 OUT | Output driver | Open-drain output driving external NMOS gate; transitions high only after OVP + 6.5s delay |
Key Features
| Feature | Design Value |
|---|---|
| Fixed OVP threshold | Factory-programmed 4.35V eliminates external resistor network and calibration effort |
| 6.5s fixed delay timer | Guaranteed fault hold-off time prevents nuisance trips during transient overvoltages |
| ±10mV OVP accuracy | Ensures tight voltage margin control for safe Li-ion cell operation near upper limit |
| 1µA ICC in idle state | Extends shelf life and reduces parasitic drain in always-connected battery packs |
| Dual VSS pins + PWRPAD | Enables low-impedance ground path and thermal dissipation for reliable operation at 110°C |
Applications
| Tablet Battery Pack Protection | Portable Instrumentation Power Safety |
|---|---|
Use Scenario: Secondary overvoltage protection in 3.7V Li-ion battery packs for consumer tablets where primary protection resides in fuel gauge or charger IC. IC Role / Device Role / Timing Role: Standalone analog OV monitor triggering NMOS gate after 6.5s delay to blow fuse upon sustained >4.35V condition. Use Value: Adds fail-safe layer independent of system MCU or charging controller, preventing thermal runaway during charger malfunction. |
Use Scenario: Safety-critical overvoltage cutoff in handheld test equipment with removable Li-ion batteries operating in field environments. IC Role / Device Role / Timing Role: Dedicated hardware-level protector with –40°C to +110°C rating, ensuring reliability across temperature extremes. Use Value: Eliminates software dependency for critical safety function; 100nA input leakage preserves battery charge during long storage periods. |
| Slates with High-Density Cells | Industrial Portable Devices |
Use Scenario: Compact form factor slates using high-capacity 4.35V-rated Li-ion cells requiring precise secondary voltage clamp. IC Role / Device Role / Timing Role: Fixed-threshold analog detector with 2.0mm × 2.0mm SON package minimizing PCB area in space-constrained designs. Use Value: Enables direct integration into narrow battery cavity layouts without external components beyond RC filters. |
Use Scenario: Ruggedized portable devices deployed in manufacturing or logistics with extended operational lifetime requirements. IC Role / Device Role / Timing Role: Second-level protector operating continuously across full industrial temperature range without derating. Use Value: Maintains ±10mV OVP accuracy and stable 6.5s delay across –40°C to +110°C, ensuring consistent safety behavior. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-cell overvoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ294602DRVR | Same 4.35V OVP threshold but 4s delay instead of 6.5s | Suitable where faster fuse activation is required under overvoltage stress | Select when system-level fault response time budget is tighter than 6.5s |
| BQ294624DRVR | Higher 4.45V OVP threshold, same 6.5s delay | Used with Li-ion cells rated for higher termination voltages (e.g., 4.4V chemistry) | Choose for newer high-voltage Li-ion variants needing elevated trip point |
Compared with BQ294604DRVR, BQ294602DRVR offers identical accuracy and package but reduced delay for faster shutdown, while BQ294624DRVR maintains the same timing but raises OVP to 4.45V-enabling compatibility with emerging high-energy-density cell chemistries.
Availability
BQ294604DRVR is available at Aetrix Electronics and suitable for tablet battery packs, portable instrumentation power safety, slates with high-density cells, and industrial portable devices requiring stable component supply with guaranteed long-term manufacturability.
Supply support for BQ294604DRVR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company delivering analog and embedded processing solutions with leadership in power management, signal chain, and high-reliability ICs.
The BQ2946xx family was designed specifically for secondary-level overvoltage protection in single-cell Li-ion battery packs-providing standalone, low-power, factory-trimmed analog safety monitoring independent of host system control.
FAQ
What is the exact overvoltage protection threshold and tolerance for BQ294604DRVR?
The BQ294604DRVR has a factory-programmed overvoltage protection (OVP) threshold of 4.35V with ±10mV accuracy at 25°C. Over temperature (–40°C to +110°C), total drift remains within ±54mV, ensuring reliable trip behavior across industrial operating conditions. This value is fixed and not user-adjustable.
How does the BQ294604DRVR output behave during and after overvoltage detection?
When V1 exceeds 4.35V, the BQ294604DRVR starts its 6.5s fixed delay timer. After expiration, the OUT pin transitions high to drive an external N-channel FET gate. If V1 drops below (4.35V – VHYS) before delay completion, OUT remains low. Once high, OUT stays high until reset by falling V1 - no automatic timeout or auto-reset.
Can BQ294604DRVR be used with lithium-ion cells rated above 4.35V?
No - the BQ294604DRVR is factory-trimmed to 4.35V and cannot be reconfigured. For cells requiring higher OVP thresholds (e.g., 4.4V or 4.45V), use BQ294624DRVR (4.45V, 6.5s) or BQ294602DRVR (4.35V, 4s). Using BQ294604DRVR with >4.35V-rated cells risks premature fuse blowing and false protection events.
What is the purpose of the two VSS pins on the BQ294604DRVR?
The BQ294604DRVR features two dedicated VSS pins (pins 3 and 4) to provide low-impedance, low-noise grounding paths for analog sensing and power domains. Both must be externally connected to the CELL– terminal on PCB. This dual-ground structure improves noise immunity for the precision V1 comparator and stabilizes output switching behavior under dynamic load conditions.
Does BQ294604DRVR support customer test mode (CTM), and how is it activated?
Yes, BQ294604DRVR supports Customer Test Mode (CTM) to verify OVP delay timing during production testing. CTM is entered by applying VDD at least 10V higher than V1 (e.g., V1 = 4.2V, VDD = 14.2V). This reduces delay to >10ms for rapid validation. Exiting CTM occurs automatically when the VDD–V1 differential falls below 10V - no command or pin toggle required.
BQ294604DRVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Battery Protection
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- 1
- Fault Protection:
- Over Voltage
- Interface:
- -
- Operating Temperature:
- -40°C ~ 110°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WSON (2x2)
BQ294604DRVR FAQ
1.How can I place an order for BQ294604DRVR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ294604DRVR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for BQ294604DRVR reliable?
The price and inventory of BQ294604DRVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ294604DRVR is usually 5 days.
3.What payment methods are accepted for BQ294604DRVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ294604DRVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ294604DRVR?
BQ294604DRVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ294604DRVR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for BQ294604DRVR?
For technical support, including BQ294604DRVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ294604DRVR requirements.
6.How does Aetrix verify that BQ294604DRVR is sourced from the original manufacturer or authorized distributors?
All BQ294604DRVR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BQ294604DRVR meets industry standards.
7.What is the process for return or replacement of BQ294604DRVR?
All BQ294604DRVR units undergo pre-shipment inspection (PSI). If there is an issue with BQ294604DRVR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The BQ294604DRVR part is unused and in its original packaging.
Return procedure for BQ294604DRVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ294604DRVR Tags
-
BQ29700DSER
Texas Instruments
-
S-8241ABKMC-GBKT2G
ABLIC Inc.
-
S-8241ABPMC-GBPT2G
ABLIC Inc.
-
BQ27427YZFR
Texas Instruments
-
BQ27426YZFR
Texas Instruments
-
STC3117IJT
STMicroelectronics
-
STC3115IJT
STMicroelectronics
-
BQ76925RGER
Texas Instruments
-
NPM1100-QDAA-R
Nordic Semiconductor ASA
-
BQ27441DRZR-G1A
Texas Instruments
-
STC3115AIQT
STMicroelectronics
-
S-8252AAL-M6T1U
ABLIC Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
